import torch
import gradio as gr
from PIL import Image
from transformers import AutoProcessor, SiglipModel
import faiss
import numpy as np
from huggingface_hub import hf_hub_download
from datasets import load_dataset
import pandas as pd
import requests
from io import BytesIO
import spaces


# download model and dataset
hf_hub_download("merve/siglip-faiss-wikiart", "siglip_10k_latest.index", local_dir="./")
hf_hub_download("merve/siglip-faiss-wikiart", "wikiart_10k_latest.csv", local_dir="./")

# read index, dataset and load siglip model and processor
index = faiss.read_index("./siglip_10k_latest.index")
df = pd.read_csv("./wikiart_10k_latest.csv")
device = torch.device('cuda' if torch.cuda.is_available() else "cpu")
processor = AutoProcessor.from_pretrained("google/siglip-base-patch16-224")
model = SiglipModel.from_pretrained("google/siglip-base-patch16-224").to(device)

def read_image_from_url(url):
    response = requests.get(url)
    img = Image.open(BytesIO(response.content)).convert("RGB")
    return img

#@spaces.GPU
def extract_features_siglip(image):
    with torch.no_grad():
        inputs = processor(images=image, return_tensors="pt").to(device)
        image_features = model.get_image_features(**inputs)
    return image_features

@spaces.GPU
def infer(input_image):
  input_features = extract_features_siglip(input_image["composite"].convert("RGB"))
  input_features = input_features.detach().cpu().numpy()
  input_features = np.float32(input_features)
  faiss.normalize_L2(input_features)
  distances, indices = index.search(input_features, 3)
  gallery_output = []
  for i,v in enumerate(indices[0]):
    sim = -distances[0][i]
    image_url = df.iloc[v]["Link"]
    img_retrieved = read_image_from_url(image_url)
    gallery_output.append(img_retrieved)
  return gallery_output


description="This is an application where you can draw or upload an image and find the closest artwork among 10k art from wikiart dataset. This is built on 🤗 transformers integration of [SigLIP](https://github.com/merveenoyan/siglip?tab=readme-ov-file#siglip-projects-) model by Google, and FAISS for indexing. In this [link](https://github.com/merveenoyan/siglip?tab=readme-ov-file#siglip-projects-) you can also find the notebook to index the dataset using SigLIP."
sketchpad = gr.ImageEditor(type="pil")

gr.Interface(infer, sketchpad, "gallery", description=description, title="Draw to Search Art 🖼️").launch()